Fastener stud



W. H. PIERCE FASTENER STUD June 28, 1927.

Filed July 22, 1925 Patented June 28, 1927.

sra'rss PATENT oFF/ICE.

WALTER H. PIERCE, OF CAMBRIDGE, MASSACHUSETTS, ASSIGNOR T CARR FASTENERCOMPANY, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MAINE.

FASTENER STUD.

Application filed July 22, 1925.

This invention aims to provide an improved fastener stud.

ln the drawings, which illustrate a preferred embodiment of my inventionFigure l is a trent elevation ot' the stud;

Fig. i). is a side elevation of the stud;

Fig. 3 is a section on the line 3-3 of Fig. l, being partly inelevation.

Fig. e is a front elevation of the attaching part, showing the millededge of the flange somewhat exaggerated; and

Fig. 5 is a section on the line 5 5 of Fig. l, being partly inelevation, and showing the cap member before the flange is crimpedbeneath the disk-like flange of the attaching part.

Referring to the drawings, I have shown the stud member of a separablefastener which includes a one-piece attaching part and a one-piece capmember both of which are circular in cross-section except a portion ofthe tool-receiving depression in the cap member.

The cap member presents a ringlike head l, a neck 2, a base 3 and aflange portion et, as best illustrated in Fig. 5. The cap is alsoprovided with a tool-receiving depression 5 extending inwardly from thehead l and herein illustrated as rectangular in crosssection throughouta portion of its depth.

The attaching part includes a flat disklike flange portion 6 ofrelatively large diameter having a toothlike or milled periphery 7 (Fig. Ll) and a screw-threaded shank portion 8 extending from the flangeportion.

rlhe cap member is secured to the attaching member by crimping theflange portion l against the milled periphery 7 and beneath the fiangeportion 6 so that the base 3 overlies the disklike port-ion 6 at oneside and the flange t overlies the other side, as shown in Fig. 3. Thetoothlike projections bite into the flange i and prevent relativeturning between the cap and the attaching part when the stud is beingscrewed into or out of' engagement with a support.

lVhen the stud is completely assembled, the bottom of the tool-receivingdepression 5 seats against and back-supports the flange portion 6 of theattaching part directly above the shank portion 8. This is particullarly necessary where the shank portion is a Serial No. 45,282.

rivet or drive screw sometimes used in connection with the type ot capmember illustrated.

A socket wrench may be inserted in the tool-receiving recess and rotatedto attach or detach the stud from a support. Rotation. oi the cap memberproduces like rotation of the attaching part because ot the interlockingengagement of the milled periphery of the disklilie portion 6 with theflange e of the cap. This interlocking arrangement pern'iits the use ofparts which are circular in cross-section without any interlockingengagement between the depressed portion 5 and the flange 6, asheretofore used in other known studs for similar use. Thus the operationof assembling` the cap and attaching part is somewhat simplified byeliminating the necessity for registering one part relative to theother.

While I have shown and. described a preferred embodinient of myinvention, it Will be understood that changes involving omission,substitution, alteration and reversal of parts may be made withoutdeparting from the scope of my invention, vwhich is best defined in thefollowing claims.

l. A stud for a separable fastener comprising a cap part providing thehead and neck of the stud and attaching means for securing said cap partto a support, said attaching means having an enlarged flat disklikeportion having a m1lled periphery, and

Vsaid cap part having a flange portion clamped about the margin ofI saiddisk-like portion to secure the parts together, said milled peripherypreventing relative turning between the parts.

2. A stud for a separable fastener comprising a cap part providing thehead and neck ot' the stud, said cap part having a depression formedtherein to provide toolreceiving means, and a cooperating attachingscrew for securing said stud to a suitable support, said screw having arelatively thin head milled at its periphery and said cap part having amarginal flange clamped over said milled periph-ery to hold the cap partand screw in assembly.

3. A separable fastener element comprising a sheet metal portionprovided with having a.- lange pressed into engagement with said milledperiphery and crimped over the margin Iof' said head.

ln testimony whereof7 have signed' my name to this speeiioation.

WALTER H. PIERCE.

